Improvement in plate-oils or varnishes for printing-inks



UNITED- STATES PATENT QFFICE.

CHARLES OOLLDTS, or NEW (ORLEANS, LOUISIANA.

lMPROVEMENT IN PLATE-OILS OR-VARNISHES FOR PRINTING-INKS.

Specification forming part of Letters Patent N 0. 192,739, dated July 3, 1877; application filed June 1, 1876.

ing the plates or lithographic stones, and for thinning the inks to bring them to the proper consistency for working, such compositions being technically known as plate-oils or varnishes.

Mycomposit-ion is intended to obviate the present tedious and expensive method of preparing the oils which form the body of the material to be used in combination with inks for plate-printing and lithography and it consists in a composition formed by mixing crude turpentine with rosin and linseed-oil, in the proportions, approximately, of three parts of rosin to one part each of linseedoil and turpentine.

These ingredients I combine asfollows: The

' crude turpentine is first warmed, and the linseed-oil is then added and thoroughly mixed with the turpentine. The rosin, being finely powdered and sifted, is then added, :andthe mixture is stirred to effect the solution of the rosin and thorough incorporation of the in- Themixture is then allowed to gredients. cool, when it is ready for mixing with the ink or coloring matter, in the usual manner.

The composition thus prepared will keep for any length of time, is easily worked, and imparts to the lines of the print or impression a clear and beautiful appearance. it also dries rapidly, and therefore dispenses with the customary additional driers.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

As a body for plate printing and lithographic ink, the composition herein described, consisting of crude turpentine, linseed-oil, and rosin, in the proportions named, substantially as described, and for the purpose set forth.

This specification signed this 21st day of April, 1876.

CHARLES COLLINS.

Witnesses: H. N. J ENKENS, T. J. ROAGH. 

